132 lines
4.2 KiB
Python
Executable File
132 lines
4.2 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (c) 2012 Openstack Foundation
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Neutron root wrapper for dom0.
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Executes networking commands in dom0. The XenAPI plugin is
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responsible determining whether a command is safe to execute.
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"""
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import ConfigParser
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import json
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import os
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import sys
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import traceback
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import XenAPI
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RC_UNAUTHORIZED = 99
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RC_NOCOMMAND = 98
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RC_BADCONFIG = 97
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RC_XENAPI_ERROR = 96
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def parse_args():
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# Split arguments, require at least a command
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exec_name = sys.argv.pop(0)
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# argv[0] required; path to conf file
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if len(sys.argv) < 2:
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print "%s: No command specified" % exec_name
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sys.exit(RC_NOCOMMAND)
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config_file = sys.argv.pop(0)
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user_args = sys.argv[:]
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return exec_name, config_file, user_args
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def _xenapi_section_name(config):
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sections = [sect for sect in config.sections() if sect.lower() == "xenapi"]
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if len(sections) == 1:
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return sections[0]
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print "Multiple [xenapi] sections or no [xenapi] section found!"
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sys.exit(RC_BADCONFIG)
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def load_configuration(exec_name, config_file):
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config = ConfigParser.RawConfigParser()
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config.read(config_file)
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try:
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exec_dirs = config.get("DEFAULT", "exec_dirs").split(",")
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filters_path = config.get("DEFAULT", "filters_path").split(",")
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section = _xenapi_section_name(config)
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url = config.get(section, "xenapi_connection_url")
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username = config.get(section, "xenapi_connection_username")
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password = config.get(section, "xenapi_connection_password")
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except ConfigParser.Error:
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print "%s: Incorrect configuration file: %s" % (exec_name, config_file)
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sys.exit(RC_BADCONFIG)
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if not url or not password:
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msg = ("%s: Must specify xenapi_connection_url, "
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"xenapi_connection_username (optionally), and "
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"xenapi_connection_password in %s") % (exec_name, config_file)
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print msg
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sys.exit(RC_BADCONFIG)
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return dict(
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filters_path=filters_path,
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url=url,
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username=username,
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password=password,
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exec_dirs=exec_dirs,
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)
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def filter_command(exec_name, filters_path, user_args, exec_dirs):
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# Add ../ to sys.path to allow running from branch
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possible_topdir = os.path.normpath(os.path.join(os.path.abspath(exec_name),
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os.pardir, os.pardir))
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if os.path.exists(os.path.join(possible_topdir, "neutron", "__init__.py")):
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sys.path.insert(0, possible_topdir)
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from neutron.openstack.common.rootwrap import wrapper
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# Execute command if it matches any of the loaded filters
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filters = wrapper.load_filters(filters_path)
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filter_match = wrapper.match_filter(
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filters, user_args, exec_dirs=exec_dirs)
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if not filter_match:
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print "Unauthorized command: %s" % ' '.join(user_args)
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sys.exit(RC_UNAUTHORIZED)
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def run_command(url, username, password, user_args):
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try:
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session = XenAPI.Session(url)
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session.login_with_password(username, password)
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host = session.xenapi.session.get_this_host(session.handle)
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result = session.xenapi.host.call_plugin(
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host, 'netwrap', 'run_command', {'cmd': json.dumps(user_args)})
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return json.loads(result)
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except Exception as e:
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traceback.print_exc()
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sys.exit(RC_XENAPI_ERROR)
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def main():
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exec_name, config_file, user_args = parse_args()
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config = load_configuration(exec_name, config_file)
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filter_command(exec_name, config['filters_path'], user_args, config['exec_dirs'])
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return run_command(config['url'], config['username'], config['password'],
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user_args)
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if __name__ == '__main__':
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print main()
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